On Fri, 27 Nov 2020, Paolo Abeni wrote:
This leverages the previous commit to reserve the wmem
required for the sendmsg() operation when the msk socket
lock is first acquired.
Some heuristics are used to get a reasonable [over] estimation of
the whole memory required. If we can't forward alloc such amount
fallback to a reasonable small chunk, otherwise enter the wait
for memory path.
When sendmsg() needs more memory it looks at wmem_reserved
first and if that is exhausted, move more space from
sk_forward_alloc.
The reserved memory is not persistent and is released at the
next socket unlock via the release_cb().
Overall this will simplify the next patch.
Acked-by: Florian Westphal <f...@strlen.de>
Signed-off-by: Paolo Abeni <pab...@redhat.com>
---
net/mptcp/protocol.c | 92 ++++++++++++++++++++++++++++++++++++++++----
net/mptcp/protocol.h | 1 +
2 files changed, 86 insertions(+), 7 deletions(-)
Reviewed-by: Mat Martineau <mathew.j.martin...@linux.intel.com>
--
Mat Martineau
Intel
